Leon Pennings articles - 24 total
Scheduling Is a Domain Problem, Not a Framework Problem
Scheduling in software often looks like a library search: “I need to run a job at 2 AM.” “Okay, add...
Why We Measure Everything in Software Except the One Thing That Matters Most
Software engineering invests enormous effort in measuring quality. We measure test coverage,...
How to Build Long-Living Software Systems
Most software systems do not fail because of bad technology choices. They fail because they stop...
Java Records: A Liability in Disguise, Not the Asset They Promise
Java 16 introduced records with great enthusiasm: a compact way to model “plain data aggregates.”...
The Toyota Way and Software Development
Why Look at Toyota? Toyota has long been the benchmark for lean, high-quality production....
Smarter Software Architecture Builds Smarter Teams
Most discussions about software architecture compare technical approaches: microservices vs...
Dependency Injection: The Anti-Pattern That Killed Object-Oriented Design and Won
Enterprise applications didn’t get better with DI - they became slower, harder to change, harder to...
Why Enterprises Should Rethink JavaScript Frameworks — and Look at GWT Again
Yesterday I wrote about how GWT isn’t a legacy web framework, but the only truly object-oriented...
Why GWT Remains the Most Coherent UI Framework for a Java Backend
Architectural integrity in a world obsessed with convenience frameworks 1. The...
Merge Requests Are a Cargo Cult - It’s Time to Stop Pretending They Improve Quality
Open any job ad, any process document, any “engineering ladder” today and you will find the same holy...
From Continuous Inspection Back to Continuous Integration: Amplify Your Development Teams
Software development is rarely a solo activity. Each developer brings skills, experience, and...
Why IT Is an Expensive Mess — And Why Nobody Inside IT Notices
Software engineering is the only discipline where you can build the equivalent of a nuclear reactor...
Why Lombok Isn’t Saving You Code — It’s Costing You a Design
There is a persistent belief in the Java ecosystem that Lombok “saves time” by removing boilerplate —...
The Duplication Paradox: How to Master Maintenance and Expedite Knowledge Transfer
In software development, we chase the holy grail of “maintainable code.” We’re told to write...
The Hidden Economics of Development Approaches - Framework driven vs Domain driven
Every few years, a new generation of frameworks appears—promising faster results, better tooling, and...
Still Reaching for Spring? Then You Might Still Think Happy Meals Are Fine Dining.
Spring is paradoxical. It “solves” problems it created — and trained a generation of developers to...
The TDD Trap: How Test-First Becomes Bad Design Forever in Most Teams
1. Introduction: The Myth of Emergent Design Test-Driven Development (TDD) promises a...
Rich Domain Model Monoliths vs. “Modern” Architectures — Are You Rich Enough to Go Modern?
The industry loves to argue about monoliths vs. microservices, DDD vs. simple CRUD, “modern”...
Software Engineering Forgot About KISS
For decades, the software industry has repeated the mantra KISS: Keep It Simple, Stupid. But...
Adaptability as the Core of Software Design
When we design and build applications, the focus tends to be on meeting the immediate business goal —...
The Real Cost of Modern Software Development — and Why We Keep Paying It
In the last two decades, software development has become incredibly sophisticated — at least on...
Improve Your Application Quality and Stability: Here’s How We Lost Focus — and How to Get It Back
For many organizations, the promise of Agile was to become more adaptive, more product-focused, and...
Tell Me Why My Design Will Fail
Why Software Engineering Needs Adversarial Design to Stay Simple Most software systems become more...
Why Software Development Is Not Assembly-Line Work
Why Continuous Domain Modeling Is Essential There is a persistent, damaging misconception...